Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-09-04
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
24 pages, 12 figures, accepted for publication in Astronomy and Astrophysics
Scientific paper
The Nainital-Cape survey is a dedicated research programme to search and study pulsational variability in chemically peculiar stars in the Northern Hemisphere. The aim of the survey is to search such chemically peculiar stars which are pulsationally unstable. The observations of the sample stars were carried out in high-speed photometric mode using a three-channel fast photometer attached to the 1.04-m Sampurnanand telescope at ARIES. The new photometric observations confirmed that the pulsational period of star HD25515 is 2.78-hrs. The repeated time-series observations of HD113878 and HD118660 revealed that previously known frequencies are indeed present in the new data sets. We have estimated the distances, absolute magnitudes, effective temperatures and luminosities of these stars. Their positions in the H-R diagram indicate that HD25515 and HD118660 lie near the main-sequence while HD113878 is an evolved star. We also present a catalogue of 61 stars classified as null results, along with the corresponding 87 frequency spectra taken over the time scale 2002-2008. A statistical analysis of these null results shows, by comparison with past data, that the power of the noise in the light curves has slightly increased during the last few years.
Billaud C.
Chakradhari N. K.
Joshi Santosh
Mary David L.
Tiwari Sanat Kumar
No associations
LandOfFree
The Nainital-Cape Survey-III : A Search for Pulsational Variability in Chemically Peculiar Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Nainital-Cape Survey-III : A Search for Pulsational Variability in Chemically Peculiar Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Nainital-Cape Survey-III : A Search for Pulsational Variability in Chemically Peculiar Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-35522